lkml.org 
[lkml]   [2016]   [Jun]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH net-next v4 1/3] ipvs: Stop calling __dev_get_by_name() repeatedly when starting sync daemon
Date
Optimise starting sync daemons by using the result of the first call to
__dev_get_by_name() and pass the result or ifindex to subsequent functions
to avoid them having to call __dev_get_by_name() again.

Signed-off-by: Quentin Armitage <quentin@armitage.org.uk>
---
net/netfilter/ipvs/ip_vs_sync.c | 60 +++++++++++++--------------------------
1 files changed, 20 insertions(+), 40 deletions(-)

diff --git a/net/netfilter/ipvs/ip_vs_sync.c b/net/netfilter/ipvs/ip_vs_sync.c
index 1b07578..fbc5ba4 100644
--- a/net/netfilter/ipvs/ip_vs_sync.c
+++ b/net/netfilter/ipvs/ip_vs_sync.c
@@ -1356,28 +1356,22 @@ static void set_mcast_pmtudisc(struct sock *sk, int val)
/*
* Specifiy default interface for outgoing multicasts
*/
-static int set_mcast_if(struct sock *sk, char *ifname)
+static int set_mcast_if(struct sock *sk, int ifindex)
{
- struct net_device *dev;
struct inet_sock *inet = inet_sk(sk);
- struct net *net = sock_net(sk);
-
- dev = __dev_get_by_name(net, ifname);
- if (!dev)
- return -ENODEV;

- if (sk->sk_bound_dev_if && dev->ifindex != sk->sk_bound_dev_if)
+ if (sk->sk_bound_dev_if && ifindex != sk->sk_bound_dev_if)
return -EINVAL;

lock_sock(sk);
- inet->mc_index = dev->ifindex;
+ inet->mc_index = ifindex;
/* inet->mc_addr = 0; */
#ifdef CONFIG_IP_VS_IPV6
if (sk->sk_family == AF_INET6) {
struct ipv6_pinfo *np = inet6_sk(sk);

/* IPV6_MULTICAST_IF */
- np->mcast_oif = dev->ifindex;
+ np->mcast_oif = ifindex;
}
#endif
release_sock(sk);
@@ -1392,23 +1386,18 @@ static int set_mcast_if(struct sock *sk, char *ifname)
* in the in_addr structure passed in as a parameter.
*/
static int
-join_mcast_group(struct sock *sk, struct in_addr *addr, char *ifname)
+join_mcast_group(struct sock *sk, struct in_addr *addr, int ifindex)
{
- struct net *net = sock_net(sk);
struct ip_mreqn mreq;
- struct net_device *dev;
int ret;

memset(&mreq, 0, sizeof(mreq));
memcpy(&mreq.imr_multiaddr, addr, sizeof(struct in_addr));

- dev = __dev_get_by_name(net, ifname);
- if (!dev)
- return -ENODEV;
- if (sk->sk_bound_dev_if && dev->ifindex != sk->sk_bound_dev_if)
+ if (sk->sk_bound_dev_if && ifindex != sk->sk_bound_dev_if)
return -EINVAL;

- mreq.imr_ifindex = dev->ifindex;
+ mreq.imr_ifindex = ifindex;

lock_sock(sk);
ret = ip_mc_join_group(sk, &mreq);
@@ -1419,44 +1408,33 @@ join_mcast_group(struct sock *sk, struct in_addr *addr, char *ifname)

#ifdef CONFIG_IP_VS_IPV6
static int join_mcast_group6(struct sock *sk, struct in6_addr *addr,
- char *ifname)
+ int ifindex)
{
- struct net *net = sock_net(sk);
- struct net_device *dev;
int ret;

- dev = __dev_get_by_name(net, ifname);
- if (!dev)
- return -ENODEV;
- if (sk->sk_bound_dev_if && dev->ifindex != sk->sk_bound_dev_if)
+ if (sk->sk_bound_dev_if && ifindex != sk->sk_bound_dev_if)
return -EINVAL;

lock_sock(sk);
- ret = ipv6_sock_mc_join(sk, dev->ifindex, addr);
+ ret = ipv6_sock_mc_join(sk, ifindex, addr);
release_sock(sk);

return ret;
}
#endif

-static int bind_mcastif_addr(struct socket *sock, char *ifname)
+static int bind_mcastif_addr(struct socket *sock, struct net_device *dev)
{
- struct net *net = sock_net(sock->sk);
- struct net_device *dev;
__be32 addr;
struct sockaddr_in sin;

- dev = __dev_get_by_name(net, ifname);
- if (!dev)
- return -ENODEV;
-
addr = inet_select_addr(dev, 0, RT_SCOPE_UNIVERSE);
if (!addr)
pr_err("You probably need to specify IP address on "
"multicast interface.\n");

IP_VS_DBG(7, "binding socket with (%s) %pI4\n",
- ifname, &addr);
+ dev->name, &addr);

/* Now bind the socket with the address of multicast interface */
sin.sin_family = AF_INET;
@@ -1489,7 +1467,8 @@ static void get_mcast_sockaddr(union ipvs_sockaddr *sa, int *salen,
/*
* Set up sending multicast socket over UDP
*/
-static struct socket *make_send_sock(struct netns_ipvs *ipvs, int id)
+static struct socket *make_send_sock(struct netns_ipvs *ipvs, int id,
+ struct net_device *dev)
{
/* multicast addr */
union ipvs_sockaddr mcast_addr;
@@ -1503,7 +1482,7 @@ static struct socket *make_send_sock(struct netns_ipvs *ipvs, int id)
pr_err("Error during creation of socket; terminating\n");
return ERR_PTR(result);
}
- result = set_mcast_if(sock->sk, ipvs->mcfg.mcast_ifn);
+ result = set_mcast_if(sock->sk, dev->ifindex);
if (result < 0) {
pr_err("Error setting outbound mcast interface\n");
goto error;
@@ -1518,7 +1497,7 @@ static struct socket *make_send_sock(struct netns_ipvs *ipvs, int id)
set_sock_size(sock->sk, 1, result);

if (AF_INET == ipvs->mcfg.mcast_af)
- result = bind_mcastif_addr(sock, ipvs->mcfg.mcast_ifn);
+ result = bind_mcastif_addr(sock, dev);
else
result = 0;
if (result < 0) {
@@ -1560,6 +1539,7 @@ static struct socket *make_receive_sock(struct netns_ipvs *ipvs, int id,
pr_err("Error during creation of socket; terminating\n");
return ERR_PTR(result);
}
+
/* it is equivalent to the REUSEADDR option in user-space */
sock->sk->sk_reuse = SK_CAN_REUSE;
result = sysctl_sync_sock_size(ipvs);
@@ -1578,11 +1558,11 @@ static struct socket *make_receive_sock(struct netns_ipvs *ipvs, int id,
#ifdef CONFIG_IP_VS_IPV6
if (ipvs->bcfg.mcast_af == AF_INET6)
result = join_mcast_group6(sock->sk, &mcast_addr.in6.sin6_addr,
- ipvs->bcfg.mcast_ifn);
+ ifindex);
else
#endif
result = join_mcast_group(sock->sk, &mcast_addr.in.sin_addr,
- ipvs->bcfg.mcast_ifn);
+ ifindex);
if (result < 0) {
pr_err("Error joining to the multicast group\n");
goto error;
@@ -1868,7 +1848,7 @@ int start_sync_thread(struct netns_ipvs *ipvs, struct ipvs_sync_daemon_cfg *c,
tinfo = NULL;
for (id = 0; id < count; id++) {
if (state == IP_VS_STATE_MASTER)
- sock = make_send_sock(ipvs, id);
+ sock = make_send_sock(ipvs, id, dev);
else
sock = make_receive_sock(ipvs, id, dev->ifindex);
if (IS_ERR(sock)) {
--
1.7.7.6
\
 
 \ /
  Last update: 2016-06-16 09:41    [W:0.148 / U:1.768 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site